Diagnosis of type 1 or type 2 diabetes mellitus (defined as FPG ≥126 mg/dl on two different occasions or random blood sugar ≥200) If fasting glucose >= 126 only once, a second lab does not need to be arranged in an attempt to diagnose diabetes. It is acceptable for the patient to proceed in the trial. Also, Tethys lab results (e.g., fasting glucose and A1C) should not be used to make decisions about including or excluding patients in the trial. Only Air Force lab results should be used to make this determination.